Folding stool



FIG. 1 is a back corner perspective view of the folding stool of my design in the knocked-down configuration;

FIG. 2 is a front corner perspective view of the folding stool of FIG. 1;

FIG. 3 is a front corner perspective view of the folding stool of my design in the assembled configuration;

FIG. 4 is a top plan view of the folding stool of FIG. 3;

FIG. 5 is a back corner perspective view of the folding stool of FIGS. 3 and 4; and,

FIG. 6 is a bottom plan view of the folding stool of FIGS. 3 through 5. 

The ornamental design for a folding stool, as shown and described. 